1/*
2 *  Copyright (C) 2012 Samsung Electronics
3 *  Copyright (C) 2012 Google Inc.
4 *
5 *  This library is free software; you can redistribute it and/or
6 *  modify it under the terms of the GNU Library General Public
7 *  License as published by the Free Software Foundation; either
8 *  version 2 of the License, or (at your option) any later version.
9 *
10 *  This library is distributed in the hope that it will be useful,
11 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
12 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13 *  Library General Public License for more details.
14 *
15 *  You should have received a copy of the GNU Library General Public License
16 *  along with this library; see the file COPYING.LIB.  If not, write to
17 *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 *  Boston, MA 02110-1301, USA.
19 */
20
21#include "config.h"
22#include "BatteryController.h"
23
24#if ENABLE(BATTERY_STATUS)
25
26#include "BatteryClient.h"
27#include "BatteryStatus.h"
28#include "Event.h"
29
30namespace WebCore {
31
32BatteryController::BatteryController(BatteryClient* client)
33    : m_client(client)
34{
35    ASSERT(m_client);
36}
37
38BatteryController::~BatteryController()
39{
40    for (ListenerVector::iterator it = m_listeners.begin(); it != m_listeners.end(); ++it)
41        (*it)->batteryControllerDestroyed();
42    m_client->batteryControllerDestroyed();
43}
44
45PassOwnPtr<BatteryController> BatteryController::create(BatteryClient* client)
46{
47    return adoptPtr(new BatteryController(client));
48}
49
50void BatteryController::addListener(BatteryManager* batteryManager)
51{
52    m_listeners.append(batteryManager);
53    m_client->startUpdating();
54
55    if (m_batteryStatus)
56        batteryManager->updateBatteryStatus(m_batteryStatus);
57}
58
59void BatteryController::removeListener(BatteryManager* batteryManager)
60{
61    size_t pos = m_listeners.find(batteryManager);
62    if (pos == WTF::notFound)
63        return;
64    m_listeners.remove(pos);
65    if (m_listeners.isEmpty())
66        m_client->stopUpdating();
67}
68
69void BatteryController::updateBatteryStatus(PassRefPtr<BatteryStatus> batteryStatus)
70{
71    RefPtr<BatteryStatus> status = batteryStatus;
72    if (m_batteryStatus) {
73        if (m_batteryStatus->charging() != status->charging())
74            didChangeBatteryStatus(WebCore::eventNames().chargingchangeEvent, status);
75        else if (status->charging() && m_batteryStatus->chargingTime() != status->chargingTime())
76            didChangeBatteryStatus(WebCore::eventNames().chargingtimechangeEvent, status);
77        else if (!status->charging() && m_batteryStatus->dischargingTime() != status->dischargingTime())
78            didChangeBatteryStatus(WebCore::eventNames().dischargingtimechangeEvent, status);
79
80        if (m_batteryStatus->level() != status->level())
81            didChangeBatteryStatus(WebCore::eventNames().levelchangeEvent, status);
82    } else {
83        for (ListenerVector::iterator it = m_listeners.begin(); it != m_listeners.end(); ++it)
84            (*it)->updateBatteryStatus(status);
85    }
86
87    m_batteryStatus = status.release();
88}
89
90void BatteryController::didChangeBatteryStatus(const AtomicString& eventType, PassRefPtr<BatteryStatus> batteryStatus)
91{
92    RefPtr<Event> event = Event::create(eventType, false, false);
93    RefPtr<BatteryStatus> battery = batteryStatus;
94    for (ListenerVector::iterator it = m_listeners.begin(); it != m_listeners.end(); ++it)
95        (*it)->didChangeBatteryStatus(event, battery);
96}
97
98const char* BatteryController::supplementName()
99{
100    return "BatteryController";
101}
102
103bool BatteryController::isActive(Page* page)
104{
105    return static_cast<bool>(BatteryController::from(page));
106}
107
108void provideBatteryTo(Page* page, BatteryClient* client)
109{
110    Supplement<Page>::provideTo(page, BatteryController::supplementName(), BatteryController::create(client));
111}
112
113}
114
115#endif // BATTERY_STATUS
116
117